[This is a draft. Thank you.]
If you are looking for a good argument for why the Christian God, if it exists, is unworthy of worship, read this post by my Christian friend.
The bottom line: If you don’t believe people who claim without evidence that their God had himself sacrificed so he could forgive humans for finite crimes, they think you will go to hell and suffer for eternity.
Nevermind that they attribute to this God qualities that make the most petulant child seem well-behaved. What further evidence does one need that religion poisons the mind and causes otherwise good people to believe and do terrible things?